JPH1067209A - Pneumatic tire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the visibility of marked letters on a pneumatic tire. SOLUTION: The solid letters 12 are composed such that the vertical distance a1 from the side wall 14 to the surface of the letter B at the starting position is 1.5mm and the vertical distances from the side wall 14 to the surfaces of the following letters the final of which is E are such that b1=1.4mm, c1=1.3mm, d1=1.2mm, e1=1.1mm, f1=1.0mm, g1=0.9mm, h1=0.8mm, i1=0.7mm, j1=0.6mm and k1=0.5mm. It is thus possible to improve the visibility by decreasing progressively the height of the solid letters 12 from the starting position to the finishing position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire in which a series of marks such as letters, numbers, symbols or figures are engraved on a surface of a sidewall of the tire along a circumferential direction.

[0002]

2. Description of the Related Art On a surface of a sidewall 14 of a pneumatic tire 50 as shown in FIG. 7, a mark row 52 of characters, numerals, symbols or figures is engraved. In order to appeal the manufacturer name, product name, size, and the like, it is important that the mark row 52 be excellent in visibility.

The engraved characters as the mark include a solid character 54 (the height v from the side wall 14 is constant for each character) shown in FIG. 8 and a double character 56 (side wall 1 shown in FIG. 9) shown in FIG.
4, the height w is constant for each character), and a horizontal ridge 58 (grooves engraved at a predetermined interval) is formed in the double character shown in FIG. Ridge character 56
(The height x from the side wall 14 and the depth y to the horizontal ridge are constant for each character), and the double ridge 60 in which the vertical ridge 60 is formed in the vertical direction in the character (bottom surface) of the double character shown in FIG. The vertical ridge characters 62 (the height x from the side wall 14 and the depth z to the vertical ridge are constant for each character) are roughly classified and used properly in consideration of the category and design of the product.

However, in the conventional engraved character, the height from the surface of the side wall 14 is constant in one character string, and the depth in the character is constant in a double character. There is a limit as a means for improving the visibility.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to improve the visibility of engraved characters in view of the above fact.

[0006]

According to the first aspect of the present invention, a series of marks such as letters, numbers, symbols or figures are engraved on the surface of the sidewall of the tire along the circumferential direction.
The heights from the surface of each mark constituting the series of marks to the surface of the sidewall are different.

[0007] For this reason, the visibility is superior to that of a conventional pneumatic tire in which the height from the surface of each mark to the surface of the sidewall is constant.

In the invention according to the second aspect, the mark is a solid mark protruding from the surface of the sidewall, and the height from the surface of each solid mark to the surface of the sidewall is different. I have.

According to the third aspect of the present invention, the height from the surface of the sidewall to the surface of the solid mark is gradually increased or decreased from the beginning to the end of the solid mark row. In this way, by giving a certain change in the height of each solid mark, the visibility is improved.

According to the fourth aspect of the present invention, the height from the surface of the sidewall to the surface of the solid mark is gradually increased or decreased from the beginning to the center of the row of solid marks and from the end to the center. .

As described above, the visibility is improved by giving rise or fall to the center of the solid mark row.

In the invention according to claim 5, the mark is a double mark composed of a frame projecting from the surface of the side wall, and the surface of each double mark extends from the surface of the double mark to the surface of the side wall. Heights are different.

According to the invention described in claim 6, the height from the surface of the sidewall to the surface of the frame is gradually increased or decreased from the starting end to the end of the row of double marks.
In this way, by giving a certain change to the height of each double mark, visibility is improved.

According to the present invention, the height from the surface of the sidewall to the surface of the frame is constant, and the depth from the surface of the frame to the bottom surrounded by the frame is a double mark. It is deeper or shallower from the beginning to the end of the chapter row.

As described above, the visibility can also be improved by keeping the height of the double mark frame constant and changing the depth to the bottom surface.

According to the eighth aspect of the present invention, the visibility is improved by forming the ridge on the bottom surface surrounded by the frame.

[0017]

FIG. 1A shows a character string 10 (BRI) as an engraved character of a pneumatic tire according to a first embodiment.
DGESTONE) is shown in FIG. 1 (B).
3 shows a cross-sectional view taken along line 1-1 corresponding to each solid character 12.

The solid characters 12 correspond to side walls 14.
To the surface of the B character which is the beginning of the character string 10
1 is 1.5 mm, and the height up to the end E character is b
1 = 1.4 mm, c1 = 1.3 mm, d1 = 1.2 m
m, e1 = 1.1 mm, f1 = 1.0 mm, g1 = 0.
9 mm, h1 = 0.8 mm, i1 = 0.7 mm, j1 =
0.6 mm and k1 = 0.5 mm.

In the above configuration, the rate of change in the height of the solid character 12 from the start B character to the end E character is 33%. As described above, the visibility can be improved by sequentially decreasing the height of the solid character 12 from the start end to the end.

In this embodiment, (BRIDGESTO)
NE), the height was set as described above, but the height of the solid character 12 was 0.1 mm to 10 mm.
Can be changed in a range of 0.4 m
The range of m to 1.5 mm is good.

Further, the rate of change can be changed in the range of 100% to 1%, preferably 100% to 27%.
Range is good.

Further, by gradually decreasing the height of the solid character 12 from the end to the start, the visibility can be improved.

Next, a pneumatic tire according to a second embodiment will be described. FIG. 2A shows a character string 16 (BRIDGESTO) as an engraved character of the pneumatic tire according to the first embodiment.
NE), and FIG. 2B is a cross-sectional view taken along line 2-2 corresponding to each solid character 18.

The solid characters 18 correspond to the side walls 14.
From a to the surface of the B character which is the beginning of the character string 16
2 is 1.0 mm, and the height up to the E character at the end is b
2 = 0.9 mm, c2 = 0.8 mm, d2 = 0.7 m
m, e2 = 0.6 mm, f2 = 0.5 mm, g2 = 0.
6 mm, h2 = 0.7 mm, i2 = 0.8 mm, j2 =
0.9 mm and k2 = 1.0 mm.

In the above configuration, the height of the solid character 18 is
It gradually decreases from the B character at the beginning and the E character at the end to the E character at the center. In addition, the change rate of the height of the solid character 18 from the B character at the beginning and the E character at the end to the E character at the center is 50%.

Thus, in the center of the character string 16,
By giving a change that causes a drop-down, the visibility is improved.

In this embodiment, (BRIDGESTO)
NE), the height was set as described above, but the height of the solid character 18 was 0.1 mm to 10 mm.
Can be changed in a range of 0.4 m
The range of m to 1.5 mm is good.

The rate of change can also be changed in the range of 100% to 1%, preferably 100% to 27%.
Range is good.

Also, as in the character string 20 of the third embodiment shown in FIG. 3, the height of the solid character 22 is gradually increased from the B character at the beginning and the E character at the end to the E character at the center. Therefore, even if the whole is swelled, the visibility can be improved.

Next, a pneumatic tire according to a fourth embodiment will be described. FIG. 4A shows a character string 24 (BRIDGESTO) as an engraved character of the pneumatic tire according to the first embodiment.
NE) is shown, and FIG. 4B is a cross-sectional view taken along line 4-4 corresponding to each double letter 26.

This double character 26 is
A character is composed of a frame 28 projecting from the surface of the frame 14, and the height from the surface of the sidewall 14 to the surface of the frame 28 gradually decreases from the start end to the end.

That is, the height a4 of the B character at the beginning of the character string 24 is 1.5 mm, and the height up to the E character at the end is b4 = 1.4 mm, c4 = 1.3 mm, d4 =
1.2 mm, e4 = 1.1 mm, f4 = 1.0 mm, g
4 = 0.9 mm, h4 = 0.8 mm, i4 = 0.7 m
m, j4 = 0.6 mm and k4 = 0.5 mm.

In the above configuration, the rate of change in the height of the solid character 12 from the start B character to the end E character is 33%. As described above, the visibility is improved by sequentially reducing the height of the double character 26 from the start end to the end.

In this embodiment, (BRIDGESTO
NE), the height was set as described above, but the height of the double character 26 was 0.1 mm to 10 mm.
Can be changed in a range of 0.4 m
The range of m to 1.5 mm is good.

The rate of change can also be changed in the range of 100% to 1%, preferably 100% to 27%.
Range is good. Note that the visibility can be improved even if the height of the double character 26 is sequentially increased from the end to the start.

Next, a pneumatic tire according to a fifth embodiment will be described. FIG. 5A shows a character string 30 (BRIDGESTO) as an engraved character of the pneumatic tire according to the first embodiment.
NE), and FIG. 5B is a cross-sectional view taken along line 5-5 corresponding to each double horizontal ridge character 32.

The height of the double horizontal ridge character 32 from the surface of the side wall 14 to the surface of the frame 34 is constant (s = 1.5 mm). The depth to the bottom surface of the ridge character 32 gradually decreases from the beginning to the end.

That is, the depth a5 of the B character at the beginning of the character string is 1.2 mm, and the depth to the E character at the end is b5 = 1.1 mm, c5 = 1.0 mm, and d5 = 0.
9 mm, e5 = 0.8 mm, f5 = 0.7 mm, g5 =
0.6 mm, h5 = 0.5 mm, i5 = 0.4 mm, j
5 = 0.3 mm and k5 = 0.2 mm.

A lateral ridge 36 is formed on the bottom surface in the lateral direction (the circumferential direction of the tire) with a depth n = 0.3 mm and a pitch p = 0.6 mm.

In the above configuration, the rate of change of the depth of the double horizontal ridge character 32 from the start B character to the end E character is 1
It is 3%. In this manner, the visibility can be improved by sequentially reducing the depth of the double horizontal ridge character 32 from the beginning to the end and forming the horizontal ridge 36.

In this embodiment, (BRIDGESTO)
NE), the depth was set as described above, but the depth of the double horizontal ridge character 32 was 0.1 mm to
It can be changed in a range of 10 mm, and further,
A range from 0.4 mm to 1.5 mm is preferred.

The rate of change can be varied in the range of 100% to 1%, and more preferably in the range of 100% to 27%.

Further, the visibility can be improved by sequentially increasing the depth of the lateral ridge from the end to the start.

Next, a pneumatic tire according to a sixth embodiment will be described. FIG. 6A shows a character string 38 (BRIDGESTO) as an engraved character of the pneumatic tire according to the first embodiment.
NE), and FIG. 6B is a cross-sectional view taken along line 6-6 corresponding to each double vertical ridge character 40.

In the sixth embodiment, the structure is the same as that of the fifth embodiment except that a vertical ridge 44 having a depth n = 0.3 mm and a pitch of 0.6 mm is formed in the vertical direction (tire centrifugal direction). Is the same as Thus, even if the horizontal ridge 36 is changed to the vertical ridge 44, the visibility is improved.

Finally, the difference between the conventional character strings shown in FIGS. 8 to 11 and the character string of the pneumatic tire according to the present invention is represented by the evaluation result of the conventional solid character 54 as 100 points. 1 is shown. As shown in Table 1, in the character display method, double characters are generally better in visibility than solid characters, and double horizontal ridge characters are better in visibility than double vertical ridge characters. I understand.

By changing the height and depth of the character as in the present invention, even a solid character is comparable to a conventional double character, and the double character is changed to a conventional double character. It turns out that it is comparable to the vertical ridge character.

[0048]

According to the present invention having the above-described structure, the visibility of the engraved character can be improved, and the information to be recognized can be appealed.

[Brief description of the drawings]

FIG. 1A is a front view showing solid characters of a pneumatic tire according to a first embodiment, and FIG. 1B is a cross-sectional view corresponding to each solid character.

FIG. 2A is a front view showing solid characters of a pneumatic tire according to a second embodiment, and FIG. 2B is a cross-sectional view corresponding to each solid character.

FIG. 3A is a front view showing solid characters of a pneumatic tire according to a third embodiment, and FIG. 3B is a cross-sectional view corresponding to each solid character.

FIG. 4A is a front view showing double letters of a pneumatic tire according to a fourth embodiment, and FIG. 4B is a cross-sectional view corresponding to each double letter.

FIG. 5A is a front view showing double lateral ridge characters of a pneumatic tire according to a fifth embodiment, and FIG. 5B is a cross-sectional view corresponding to each double lateral ridge character.

FIG. 6A is a front view showing double vertical ridge characters of a pneumatic tire according to a sixth embodiment, and FIG. 6B is a cross-sectional view corresponding to each double vertical ridge character.

FIG. 7 is a front view showing engraved characters engraved on a sidewall of the pneumatic tire.

FIG. 8A is a front view showing a solid character of a conventional pneumatic tire, and FIG. 8B is a sectional view corresponding to the solid character.

FIG. 9A is a front view showing double letters of a conventional pneumatic tire, and FIG. 9B is a cross-sectional view corresponding to the double letters.

10A is a front view showing a double lateral ridge character of a conventional pneumatic tire, and FIG. 10B is a cross-sectional view corresponding to the double lateral ridge character.

11A is a front view showing a double vertical ridge character of a conventional pneumatic tire, and FIG. 11B is a cross-sectional view corresponding to the double vertical ridge character.

[Explanation of symbols]

 10 Solid character string (mark string) 12 Solid character (mark, solid mark) 14 Side wall 18 Solid character (mark, solid mark) 22 Solid character (mark, solid mark) 26 Double letter ( Double mark) 28 frame 32 double horizontal ridge character 34 frame 36 horizontal ridge (ridge) 40 double vertical ridge character 44 vertical ridge (ridge)

Claims (8)

[Claims] 1. A character on a surface of a sidewall of a tire,
In a pneumatic tire in which a series of marks such as numbers, symbols or figures are engraved along the circumferential direction, the height from the surface of the sidewall to the surface of each mark constituting the series of marks is different. A pneumatic tire, characterized in that: 2. The pneumatic tire according to claim 1, wherein the mark is a solid mark protruding from a surface of the sidewall. 3. The solid mark according to claim 2, wherein a height from a surface of the sidewall to a surface of the solid mark is gradually increased or decreased from a starting end to a terminating end of the row of solid marks. The pneumatic tire as described. 4. The height from the surface of the sidewall to the surface of the solid mark is gradually reduced or increased from the beginning to the center of the row of solid marks and from the end to the center. The pneumatic tire according to claim 2, wherein 5. The pneumatic tire according to claim 1, wherein the mark is a double mark composed of a frame projecting from a surface of the sidewall. 6. The structure according to claim 5, wherein the height from the surface of the side wall to the surface of the frame body is gradually increased or decreased from a start end to an end of the row of the double marks. The pneumatic tire as described. 7. The height of the double mark is such that the height from the surface of the side wall to the surface of the frame is constant, and the depth from the surface of the frame to the bottom surrounded by the frame is the same. The pneumatic tire according to claim 5 or 6, wherein the pneumatic tire is gradually deepened or shallowed from the start end to the end. 8. The pneumatic tire according to claim 5, wherein a ridge is formed on a bottom surface surrounded by the frame.